To solve the vector problem of finding the magnitude of A + B, the discussion highlights the need to utilize vector addition methods such as head-to-tail, the parallelogram method, or componentwise addition. The provided data includes angles θ1 and θ2, as well as the magnitudes of vectors A and B. Participants are encouraged to consider how to find the components of each vector based on the given angles. Understanding these methods is crucial for accurately calculating the resultant vector's magnitude. The conversation emphasizes the importance of mastering vector addition techniques in physics.